Mitering-machine.



No. 655,422. I Patented Aug. 7, 1900.

J. L. TYLER.

MITEBING MACHINE.

(Application filed Sept. 6, 1899.)

(No Model.)

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ATTORNEY- UNITED STATES PATENT OFFICE.

JOSEPH L. TYLER, OF LYNN,'MASSACHUSETTS.

MlTERlNG-MACHINE.

SPECIFICATION forming-part of Letters Patent No. 655,422, dated August '7, 1900. Application filed September 6, 1899. Serial No. 729,578. (No model.)

To all whom, it may concern.-

Be it known that I, JOSEPH L. TYLER, of Lynn, in the county of Essex and State of Massachusettshave invented certain new and useful Improvements in Mitering-Machines, of which the following is a specification.

This invention relates to miteringinachines for cutting and planing the ends of picture-frame moldings and other work, and it relates more particularly to machines of this kind operated by the pressure of the operators foot upon a treadle and employing a" weight which acts to return the cutter after a cutting stroke and also to give the cutter momentum on the cutting stroke.

The invention has for its object to provide an improved connection between the weight and the treadle, whereby the stroke may be increased and the action of the weight made more uniform.

To this end the invention consists in the improvements which I shall now proceed to describe and claim.

The accompanying drawing illustrates a side elevation, with parts broken away, of a mitering-machine constructed in accordance with my invention.

Referring to the drawing, 1 is the frame of the machine, having a work-supporting table 2 at its upper end and vertical guides at for the cutter-head 3.

The cutter-head 3 is pivotally connected at 6 with a link 5, pivoted at 8 at its lower end to a t-readle 7. The latter is fulcrumed at 9 upon the machine-frame, and when depressed by the pressure of the operators foot it imparts a downward cutting stroke to the cuttor-head.

10 is a weight adjustably secured to an arm 11, which is fastened to a rock-shaft 12. 13 is a gear-segment secured to said rock-shaft and meshing with the teeth of a rack 14, formed on the rear edge of the link 5. The action of the weight, as will be seen, is to oscillate the rack 13 and normally elevate the link 5, the cutter-head 3, and the treadle 7. WVhen the treadle 7 is depressed, the weight 10 will be elevated, and if the pressure on the treadle is sudden and forceful the inertia of the weight transmitted through the segment 13 and rack 14: will impart a momentum to the cutter-head 3, which assists in the downward stroke of the latter. Heretofore the connection between the weight and the link has been a pivotal one, and by reason of the varying angular relation of said parts during the stroke the force due to the weight was not uniformly exerted on the cutter and the stroke was also limited by the said connection of the parts. By means of my improvement the stroke is lengthened and the force due to the weight is uniformly exerted. The rack 14: is preferably given a slight iiiward curvature to allow for the lateral movement of the link 5 during the stroke. This provides a relative shaping of the rack and segment-gearing which insures the preservation of the engagement of the teeth of the link with the teeth of the segment during the swinging movement of the link when oper= ated vertically by thetreadle, said swinging movement being due to the fact that the upper end of the link is pivoted at 6 to the cut tor-head, which moves only vertically, while the pivotal point 8 moves in the arc of a circle of which the fulcrum 9 of the treadle is the center.

The table 2 is'equipped with a pair of gages, one of which is shown at 15 in the drawing, each gage being connected to a sliding gageblock 16 by means of a device 17, so constructed as to permit both longitudinal and angular adjustment and clamping of said gage. I do not herein claim such structure, as the same is claimed in a copending application filed by me September 6, 1899, Serial No. 729,577.

I claim In a mitering-machine, a cutter-l1ead having suitable guides, a treadle, a link connecting said treadle with said cutter-head and* provided with a rack, an oscillatory weighted arm, and a gear-segment connected therewith and meshing with the rack, the rack and segment-gearing being relatively shaped to preserve the engagement of the teeth of the link with the teeth of the segment during the operation of the treadle, substantially as and for the purpose set forth.

In testimony whereof I have affixed my signature in presence of two witnesses.

JOSEPH L. TYLER.

Witnesses:

SYDNEY S. CHANDLER, WM. Gr. CHANDLER. 

